The Curious Incident of the Dog in the Night-time

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Across
  1. 3. / Cautious, wary
  2. 4. / Getting of topic temporarily
  3. 7. / The centre of a black hole
  4. 8. / Dizzy, disoriented
  5. 13. / A story or statement of doubtful authenticity, lie
  6. 16. / An earlier event or action that sets an example
  7. 17. / Hill or rocky peak
  8. 18. / Slope
  9. 19. / Having or showing weakness/diseases due to old age
  10. 20. Herring / Misleading clue
Down
  1. 1. / Silly, foolish
  2. 2. / Calm and sensible
  3. 5. / mechanical parts with jagged edges used to turn a wheel
  4. 6. / Insignificant, unimportant
  5. 9. / Small, compressed mass of a substance
  6. 10. / Feeling great anger, furious
  7. 11. / Active at night
  8. 12. / Annoyed, angry
  9. 14. / Damaged, spoiled
  10. 15. / An opening, hole, gap